Heads question

Kirk,you have not mention at all the motor size or your intend rpm of shifting or use for the car.Both sets of heads can be great if used in the right applacation forum.A 360 street motor will benifit more with the "J"s on it,where as a strickly race motor for the weekend will be great to use a bigger valve head if the rpm,s are going to be well over 6500rpm,Mrmopartech